Noun. The expression on the face of someone taking it in the ass.
Yeah baby, show me your illingworth.
Verb. To display a camp look of complete stupefied blankness in response to a concept, event or word.
I asked him where his metatarsals were and he just illingworthed.
Facial expression most commonly seen on the face of someone having a poo.
I love you honey, but you'll never see my illingworth.
A word often substituted for 'dipshit'.
Ah man why would you do that? You are such an illingworth!
Drummer of English band Fearless Vampire Killers.
Luke Illingworth is an amazing drummer.